Update rubocop dependency to >= 0.28
Update rubocop dependency to >= 0.28

chastell/t,sferik/t,chastell/t,cyrixhero/t,cyrixhero/t,zazens/t,l371559739/t,sideci-sample/sideci-sample-t,cyrixhero/t,zazens/t,sideci-sample/sideci-sample-t,tjschuck/t,sferik/t,sjfloat/t,chastell/t,zenspider/t,sjfloat/t,zenspider/t,l371559739/t,zazens/t,tjschuck/t,zenspider/t,sjfloat/t,l371559739/t